Slipper



FIG. 1 is a top plan view of a slipper showing my new design;

FIG. 2 is a side elevational view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a bottom plan view of the slipper. 

The ornamental design for a slipper, as shown. 